Smoke-consuming furnace



NITED STATES ,PA-Tang* QrFIGE@ i FRANKLIN B. GIESLER, 0F MILWAUKEE,'VISCONSIN.

fPFi-CIFICATION forming part `of Letters Paten-t No. 313,071, datedMarch 3, 188.5.

Application filed September 26, 1884. (No model.)

,Fi g. 2 is a vertical longitudinal section through the center of thefurnace, and Figs. 3 and 4. are details.

A is the furnace, having the usual boiler, B.

C C are doors that open in the combustionchamber, and C C are doors thatgive access to the draftchambe beneath the grate, and from thisVdraftchamber short fines D D lead into ahorizontal due, D, which latteris connected at one end with a blower, E, and at the other has auexhaust-pipe, FJ, leading down into it.

F is a smoke-chamber, which is connected with the furnace by a flue, F,and with the blower E by a pipe, F.

G is the smoke-stack,which is provided close 4'to its point ofconnection with the smoke-chamber with a damper, g, a slight distanceabove which the exhaustpipe E enters the said smoke-stack. Anotherdamper, f, is fitted in the pipe F2 close to the smoke-chamber, andconnected to the lowerpart of the said pipe F2 is a small flue, F3, openat its lower end to ad- Amit fresh air through the regulating-valve fThe short flues D' D', which connect thehoricrank a of the shaft A',carryingthe cone-pul-4 ley a2, mounted with its companion pulley a3 inany suitable form of hanger on the corresponding side of the furnace.

The cone-pulley as is connected in any suitable manner with the drivingmechanism.

In the center of the combustion-chamber I provide a fine, H, of anysuitable form, but preferably of the shape shown in Figs. 3 and 4..rIhis flue extends the whole length of the firebed, its closed bottomresting on top of the grate-bars 7L h. In the upper part of lthis ue aseries of perforations, h h' h h', are made on each side.

A passage, H2, is formed in the front of the furnace, between the doorsG C, to admit fresh air from the outside to said flue H through acorresponding opening, H3, in the end wall of the flue, -and thispassage has atrapdoor, H', which may be kept more or less open by meansof any form of adjustable latch in use.

The blower E is belted in any suitable manner, as at pulley E2, with thedriving mechanism.

rlhe operation of my device is as follows: Vhen the furnace iire isfirst lighted, the damper g in the smoke-stack G is opened and the smokepasses outinit until sufficientsteam has been raised to operate theblower; but when this occurs the damper g is closed, andthe dampers f ofpipe F2, as well as the dampersf'l fzin the short ilues D', being open,the blower will draw the smoke from the chamber Ffand force it throughthe flue D and its branches D and into the lire-box, together with acertain quantity of fresh air thatis ind ucedin the same time throughthe small iue F3, the amount of air thus admitted being regulated bymeans of the valve f.

The valve e in the lower end of the exhaustpipe VE is lifted atintervals determined by the position of the belt that connects thecone-pulleys a and a3, and this intermitting opening will permit thecarbonio-acid gas and surplus smoke to pass out and away. This valvemay, moreover, be set so as always to be partly open, so that there maybe a constant draftthat will carry off the carbonio-acid gas in flueD,while the smoke is forced through the tire-box to form part of thefuel. As the fresh air admitted through the door H and opening orpassage H2 into the iiue H becomes sufficiently heated it rushes upthrough the perforations in the upper portion of the said flue, and befsides producing a current that powerfully in- ICO duces the return smokeup through the lirebed it contributes its additional volume of oxygen tomaterially .aidthe combustion of the gases. Y

Having thus described my invention,\vhatI claim as new, and desire tosecure by Letters Patent, is- Y 1. The combiuation,with a furnace, ofpipe D, D', F, F2, andF3, the reservoir and blower, pipe E and itsvalve, and mechanism forlifting the latter at set intervals,substantially as described.

2. In a smokeconsumer, in combination with the furnace A, the horizontalflue D, and branches D D', of a chamber or flue formed Y forth.

above the grate-bars in the center and the Whole length of the furnace,and having its closed bottom resting on the grate-bars, suitableperforations on each side near its top,and an adjustable door opening inthe furnace front, substantiallyas and for the purpose set In testimonythat I claim the foregoing I have hereunto set my hand, at Milwaukee, inthe county of Milwaukee and State of Wiscon. sin, in the presence oftwowitnesses. FRANKLIN B. GIESLER. Witnesses:

, S. S. SToUr,

H. J. FoRsY'rHE.-

